agree pace = speed...
its seem agility depends on height and weight of the players but not a ability anymore..
tight possession enhance smooth movement and protect the ball during possession at low speed.
there are strange findings for those gk abilities to on-field players, especially defenders,
you can have a little test if interested:
GK awarenesss - response of defender trying to block the shoot by a jump or sliding;
GK clearing - the logic the ball bounce after hitting the defender,
if high - bounce side or front, if low - bounce though and pass haha
GK reflex - response of defender to a cross or pass, um...it can be described as marking tighteness
GK reach - how much effect of arm movement of a defender affecting the rival during marking..